/**
 * 
 */
package t4j.arrays;

import java.util.Arrays;
import java.util.Random;

public class IceCream {

	private static Random rand = new Random(47);
	
	static final String[] FLAVORS = {
		"Chocolate","Strawberry","Vanilla Fudge Swirl","Mint Chip","Mocha Almond Fudge","Rum Raisin",
		"Praline Cream","Mud Pie"
	};
	
	public static String[] flavorSet(int n){
		
		if(n > FLAVORS.length)
			throw new IllegalArgumentException("set too big");
		
		String[] results = new String[n];
		
		boolean[] picked = new boolean[FLAVORS.length];
		
		for(int i=0;i < n ; i++){
			int t;
			do
				t = rand.nextInt(FLAVORS.length);
			while(picked[t]);
			
			results[i] = FLAVORS[t];
			
			picked[t] = true;
		}
		
		return results;
	}
	
	public static void main(String[] args) {
		for(int i = 0; i < 7 ; i++)
			System.out.println(Arrays.toString(flavorSet(3)));
	}
 }
